The Republican presidential nominee's wife was headed to Los Angeles, but landed in Denver where emergency vehicles met the plane.

Saul tweeted that an electrical fire was the cause. She said Ann and Mitt Romney, who was in Las Vegas for a campaign event, spoke by phone after the plane landed.

Mrs. Romney was in Omaha earlier in the day. During a radio interview in Iowa yesterday, Romney lashed out at her husband's conservative critics, telling them to "stop it" for sniping about the GOP presidential nominee's recent travails, including remarks caught secretly on videotape. WASHINGTON (AP) - The plane carrying the wife of Republican presidential candidate Mitt Romney is making an emergency landing.

Romney spokeswoman Andrea Saul said Ann Romney's plane made an unexpected landing on Friday afternoon in Colorado after it filled with smoke. Saul says no one was injured in the incident.

Mitt Romney was in Nevada, appearing at a fundraiser and rally on Friday. He was heading to California this weekend to raise money.